Graphene film electric heating device

Abstract

The utility model discloses a graphene film electric heating device which comprises graphene functionalized inorganic fiber cloth and a heat conduction carrier which are tightly attached in a mechanical fixing mode. The graphene functional inorganic fiber cloth comprises any one of graphene functional glass fiber cloth, graphene functional quartz fiber cloth, graphene functional ceramic fiber cloth, graphene functional mica fiber cloth and graphene functional basalt fiber cloth; the graphene functionalized inorganic fiber cloth comprises fiber cloth and a graphene film covering the fiber cloth, and the thickness of the graphene film is 1-20 nm. According to the graphene film electric heating device provided by the utility model, the adopted graphene functionalized inorganic fiber cloth can realize rapid surface heating, compared with a traditional heating wire, the heating area is large, the heating is uniform, the heating efficiency can be effectively improved, and the problems of shedding and powder falling in the graphene heating process do not need to be considered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of graphene heating device, specifically is a graphene film electric heating device. BACKGROUND

[0002] At present, the ceramic electric heating element widely used in market has many kinds, and the more common ones are ceramic electric heating plate, ceramic electric heating tube and ceramic electric heating sheet etc. The main structure of these electric heating devices is to embed electric heating wire inside when pressing ceramic base, but the temperature uniformity of electric heating wire is not good, so the overall electric heating efficiency is low and the temperature rising rate is slow. In addition, with the development of graphene technology, the existing part of ceramic electric heating plate adopts graphene slurry to coat on the surface of ceramic to form electric heating film, which can realize rapid temperature rising, however, the electric heating film formed by graphene slurry is thick film with thickness above several tens of microns, the thickness and uniformity of which are uncontrollable, leading to difficulty in controlling the heating temperature uniformity, and the problem of easy powder falling in the use process exists. SUMMARY

[0003] The utility model aims at at least in a certain extent solves one of the technical problems in the prior art: provide a kind of graphene film electric heating device, the graphene functional inorganic fiber cloth that it adopts can face heating, compared with traditional electric heating wire, heating area is large, heating is uniform, can effectively improve heating efficiency, and graphene functional inorganic fiber cloth does not need to consider powder falling problem in the process of heating.

[0004] Therefore, one purpose of the utility model is to provide a kind of graphene film electric heating device, including graphene functional inorganic fiber cloth and heat-conducting carrier, the graphene functional inorganic fiber cloth and heat-conducting carrier are closely adhered in the way of mechanical fixation;

[0005] The graphene functional inorganic fiber cloth includes any one of graphene functional glass fiber cloth, graphene functional quartz fiber cloth, graphene functional ceramic fiber cloth, graphene functional mica fiber cloth and graphene functional basalt fiber cloth;

[0006] The graphene functional inorganic fiber cloth includes fiber cloth and one or more layers of continuous graphene film covered on the fiber cloth, and the thickness of the graphene film is 1nm-20nm.

[0007] Firstly, the graphene functionalized inorganic fiber cloth itself is in a surface heating form in the process of heating by electricity, and the heating is uniform, and the graphene functionalized inorganic fiber cloth is different from the existing graphene paste coated graphene thick film layer, and there is no problem of powder falling in the heating process. Secondly, the graphene functionalized inorganic fiber cloth is fixed on the heat conducting carrier by a mechanical fixing mode, so that the graphene functionalized inorganic fiber cloth can transfer heat to the heat conducting carrier, and the heat conducting carrier can not only provide a stable heat source to the outside, but also protect the graphene functionalized inorganic fiber cloth.

[0008] According to an example of the utility model, the heat conducting carrier includes a ceramic block, and the graphene functionalized inorganic fiber cloth and the ceramic block are bonded by a heat conducting type insulating paste;

[0009] The heat conducting type insulating paste is magnesium oxide paste or heat conducting silica gel. The heat conducting type insulating paste can not only bond and fix the heat conducting carrier and the graphene functionalized inorganic fiber cloth, but also improve the heat conducting performance between the heat conducting carrier and the graphene functionalized inorganic fiber cloth, so that the ceramic block can stably provide heat to the outside.

[0010] According to an example of the utility model, the heat conducting carrier includes a bottom frame, a ceramic block and a pressing strip, the pressing strip is detachably connected with the bottom frame, so that the ceramic block is fixed with the bottom frame, and the graphene functionalized inorganic fiber cloth is clamped between the bottom frame and the ceramic block;

[0011] The pressing strip and the bottom frame are made of one or more of mica, magnesium oxide ceramic, high-temperature resistant polytetrafluoroethylene and high-temperature resistant PPL. The ceramic block is fixed with the bottom frame by the pressing strip, so that the graphene functionalized inorganic fiber cloth is clamped between the ceramic block and the bottom frame, and the materials of the pressing strip and the bottom frame are all insulating.

[0012] According to an example of the utility model, the bottom frame is made of an insulating and heat insulating material, and the bottom frame includes a bottom plate and a plurality of retaining edges arranged at the edge positions of the bottom plate, each retaining edge and the bottom plate form a containing groove, the graphene functionalized inorganic fiber cloth is laid in the containing groove, the ceramic block is placed in the containing groove and is pressed on the graphene functionalized inorganic fiber cloth, and the graphene functionalized inorganic fiber cloth has an electrode sheet for connecting an external power supply. The bottom frame is made of an insulating and heat insulating material, so that the heat generated by the graphene functionalized inorganic fiber cloth can be conducted to the ceramic block, and the heat utilization rate is high.

[0013] According to an example of the utility model, the multiple blocking edges include left blocking edge, right blocking edge and rear blocking edge, left blocking edge and right blocking edge are located at the left and right sides of bottom plate, rear blocking edge is located at the rear side of bottom plate and is connected with left blocking edge and right blocking edge at both ends, the accommodating groove formed by each blocking edge and bottom plate is left with opening at the front side position of bottom plate, the ceramic block is embedded in the accommodating groove through the opening position, and the pressing strip is arranged at the opening position. The ceramic block can be conveniently embedded into the accommodating groove through the opening position along the horizontal direction, and the relative fixation of the ceramic block and the bottom frame can be realized through the fixed connection of the pressing strip and the bottom frame, and the whole loading and unloading process is convenient.

[0014] According to an example of the utility model, the electrode sheet of graphene functionalized inorganic fiber cloth is exposed to the outside of bottom frame through the opening position along the horizontal direction. The exposed electrode sheet can be used as an electric connection end for electrically connecting with external power supply.

[0015] According to an example of the utility model, the pressing strip is threadedly connected with the bottom frame through a conductive screw, the conductive screw is electrically connected with the electrode sheet of graphene functionalized inorganic fiber cloth, and one end of the conductive screw is exposed to the outside of the pressing strip. The conductive screw is electrically connected with the electrode sheet on the graphene functionalized inorganic fiber cloth through the conductive screw, so that the conductive screw serves as an electric connection end for electrically connecting with external power supply, and therefore all the electrode sheets can be hidden in the bottom frame, reducing the probability of power failure caused by damage of the exposed electrode sheets.

[0016] According to an example of the utility model, the accommodating groove is provided with a sliding groove on the groove inner wall, and the ceramic block is provided with a sliding block on the outer side wall and is in sliding cooperation with the sliding groove; when the pressing strip is fixedly connected with the bottom frame, the sliding block is limited in the sliding groove, so that the ceramic block is fixedly connected with the bottom frame.

[0017] According to an example of the utility model, the ceramic block includes a pad plate and a top block, the pad plate is located between the top block and the graphene functionalized inorganic fiber cloth, the accommodating groove is provided with a sliding groove on the groove inner wall, and the top block is provided with a sliding block on the outer side wall and is in sliding cooperation with the sliding groove; when the pressing strip is fixedly connected with the bottom frame, the sliding block is limited in the sliding groove, so that the ceramic block is fixedly connected with the bottom frame. The ceramic block is divided into the pad plate and the top block, the pad plate can be first pressed on the graphene functionalized inorganic fiber cloth, and then the top block is installed into the accommodating groove in the horizontal sliding mode, avoiding the damage of the graphene functionalized inorganic fiber cloth caused by the direct sliding of the ceramic block on the graphene functionalized inorganic fiber cloth.

[0018] According to an example of the utility model, the left fender and the right fender have symmetrically arranged sliding grooves, the rear fender has a clamping groove, the top block is provided with sliding blocks on the left and right sides, and the rear side of the top block is provided with a convex edge matched with the clamping groove.

[0019] According to an example of the utility model, the gasket and the top block are coated with heat-conducting silicone grease or heat-conducting resin or heat-conducting glue.

[0020] The above technical scheme has the following advantages or beneficial effects: firstly, the graphene functionalized inorganic fiber cloth is used as the electric heating element, the continuous graphene film with nanometer thickness on the fiber surface can realize rapid temperature rise and fall, and combined with the large-area fiber cloth structure formed by fiber weaving, the large-area and uniform heating of the ceramic is realized. The graphene film with nanometer thickness has strong bonding force with the fiber surface, avoids falling off during use, improves the stability and service life of the electric heating device, and avoids the pollution problem of falling powder. Secondly, the graphene film attached to the surface of the fiber cloth can form good and stable contact with the ceramic through simple mechanical fixing, without complex transfer operation of the conventional graphene film, and the chemical reagent pollution problem caused by the graphene slurry coating process is also avoided. Thirdly, the heat-conducting carrier is specifically a bottom frame made of insulating and heat-insulating material, which cooperates with the ceramic block, so that the heat generated by the graphene functionalized inorganic fiber cloth can be well conducted to the ceramic block, and the heat utilization rate is high. Fourthly, the screws used for installation between the pressing strip and the bottom frame are conductive screws, so that after the electrode sheet is electrically connected with the conductive screws, the exposed part of the conductive screws can be used as a power connection end connected with an external power supply, thereby avoiding the problem of electrode sheet fracture caused by the exposure of the electrode sheet. Fifthly, the ceramic block adopts the structure of the gasket and the top block, the gasket is first pressed on the graphene functionalized inorganic fiber cloth, and then the top block is slid into the accommodating groove in the horizontal direction to complete the installation, thereby avoiding the damage of the graphene functionalized inorganic fiber cloth caused by the direct sliding of the ceramic block on the graphene functionalized inorganic fiber cloth. Finally, heat-conducting silicone grease or heat-conducting resin or heat-conducting glue is coated between the gasket and the top block, and the heat-conducting silicone grease or heat-conducting resin or heat-conducting glue improves the heat conduction efficiency between the gasket and the top block.

[0021] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the structure schematic view of graphene film electric heating device of the utility model.

[0023] Figure 2 for Figure 1 Disassembly diagram.

[0024] Figure 3 This is a top view schematic diagram of the graphene thin film electric heating device of this utility model.

[0025] Figure 4 for Figure 3 A cross-sectional view along the "AA" direction.

[0026] Figure 5 This is an axonometric view of the bottom frame in this utility model.

[0027] Figure 6 This is an axial side view of the top block in the ceramic block.

[0028] Figure 7 for Figure 6 Side view of the top block.

[0029] Figure 8 This is an enlarged schematic diagram of the bonding of graphene-functionalized inorganic fiber cloth and ceramic block.

[0030] Among them, 100 is graphene-functionalized inorganic fiber cloth; 101 is fiber cloth; 102 is continuous graphene film; and 200 is thermal conductive carrier.

[0031] 1. Ceramic block; 2. Thermally conductive insulating grout; 3. Pressure strip; 3.1. Second slot; 4. Base plate; 4.1. Receiving groove; 5. Electrode plate; 6. Pad plate; 7. Top block; 8. Left side guard; 9. Right side guard; 10. Rear side guard; 11. Opening; 12. Conductive screw; 13. Slide groove; 14. Slider; 15. Slot; 16. Protruding edge; 17. Second protruding edge; 18. Guide slope. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] The graphene thin film electric heating device according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] The following text is in the format of Figure 3 The left and right directions represent the width, the front and back directions represent the length, and the direction perpendicular to the paper represents the thickness.

[0035] The graphene functionalized inorganic fiber cloth 100 refers to a fiber cloth 101 made of multiple inorganic materials as a base material, and one or more continuous graphene film layers 102 are obtained on the base material by graphene growth, the continuous graphene film 102 has a heating function, and therefore the inorganic fiber cloth with the continuous graphene film 102 is called graphene functionalized inorganic fiber cloth 100. The graphene growth method refers to the existing graphene growth methods such as chemical vapor deposition, epitaxial growth, scanning electromagnetic induction ultrafast growth, etc. to make the graphene film layer grow on the base material, the graphene film formed in the process of growing the graphene film layer is continuous, and therefore it is also called continuous graphene film 102. Preferably, the graphene growth method adopts the graphene surface modification fiber functionalized reinforced plastic and its preparation method disclosed in CN117468233A.

[0036] The graphene functionalized inorganic fiber cloth 100 can be classified as glass fiber cloth, quartz fiber cloth, ceramic fiber cloth, mica fiber cloth, magnesium oxide fiber cloth and basalt fiber cloth, etc. according to the inorganic materials used in the inorganic fiber cloth, and the graphene functionalized inorganic fiber cloth 100 made of the above materials can be called graphene functionalized glass fiber cloth, graphene functionalized quartz fiber cloth, graphene functionalized ceramic fiber cloth, graphene functionalized mica fiber cloth and graphene functionalized basalt fiber cloth, etc. The graphene basalt fiber cloth is a composite material combining graphene and basalt fiber, and the graphene glass is a composite material combining graphene and glass. It should be understood that the graphene fiber cloth, graphene basalt fiber cloth and graphene glass are all conventional materials in the graphene field, and the structures of various graphene composite materials used in the graphene functionalized inorganic fiber cloth 100 are not described one by one in this embodiment.

[0037] Embodiment one

[0038] The graphene functionalized inorganic fiber cloth 100 includes graphene functionalized glass fiber cloth, graphene functionalized quartz fiber cloth, graphene functionalized ceramic fiber cloth, graphene functionalized mica fiber cloth and graphene functionalized basalt fiber cloth.

[0039] The graphene functionalized inorganic fiber cloth 100 includes graphene functionalized glass fiber cloth, graphene functionalized quartz fiber cloth, graphene functionalized ceramic fiber cloth, graphene functionalized mica fiber cloth and graphene functionalized basalt fiber cloth.

[0040] The graphene functionalized inorganic fiber cloth 100 includes fiber cloth 101 and one or more continuous graphene film layers 102 covering the fiber cloth 101, and the thickness of the continuous graphene film 102 is 1nm~20nm.

[0041] In the embodiment, the continuous graphene film 102 is grown on the fiber cloth 101 in a graphene growth manner, so that a graphene film with a thickness of nanometer level can be grown, which is different from a graphene slurry formed by mixing graphene powder with other solvents. The graphene slurry is coated on the surface of a substrate to form a graphene thick film with a thickness far exceeding the nanometer level, and the graphene in the graphene thick film layer formed by the graphene slurry is not continuous.

[0042] In the embodiment, the mechanical fixation refers to a fixation manner in which the graphene functionalized inorganic fiber cloth 100 and the heat-conducting carrier 200 are attached to each other in a three-dimensional space and the physical state of the attachment is maintained. The mechanical fixation manner includes but is not limited to mutual adhesion and mutual close contact under a relative clamping force.

[0043] Embodiment two

[0044] Based on the above preferred embodiment one, the heat-conducting carrier 200 includes a ceramic block 1, and the graphene functionalized inorganic fiber cloth 100 and the ceramic block 1 are bonded by a heat-conducting type insulating paste 2.

[0045] The heat-conducting type insulating paste 2 is magnesium oxide paste or heat-conducting silica gel.

[0046] In the embodiment, the heat-conducting type insulating paste 2 is coated between the graphene functionalized inorganic fiber cloth 100 and the ceramic block 1, and the heat-conducting type insulating paste 2 forms a heat-conducting type insulating paste layer after being extruded when the graphene functionalized inorganic fiber cloth 100 and the ceramic block 1 are attached to each other. The graphene functionalized inorganic fiber cloth 100 and the ceramic block 1 are bonded by the heat-conducting type insulating paste layer.

[0047] Embodiment three

[0048] Based on the above preferred embodiment one or embodiment two, the heat-conducting carrier 200 includes a bottom frame, a ceramic block 1 and a pressing strip 3, the pressing strip 3 is detachably connected with the bottom frame, so that the ceramic block 1 is fixed with the bottom frame, and the graphene functionalized inorganic fiber cloth 100 is clamped between the bottom frame and the ceramic block 1.

[0049] The pressing strip 3 and the bottom frame are made of one or more of mica, magnesium oxide ceramic, high-temperature-resistant polytetrafluoroethylene and high-temperature-resistant PPL.

[0050] In the embodiment, the bottom frame is made of one or more of mica, magnesium oxide ceramic, high-temperature-resistant polytetrafluoroethylene and high-temperature-resistant PPL, so that the bottom frame has good heat insulation and insulation performance. PPL stands for polyphenylene sulfide, which is a high-performance polymer material.

[0051] Embodiment Four

[0052] Based on the above preferred embodiment three, the bottom frame is made of insulating and heat-insulating material, which includes a bottom plate 4 and a plurality of retaining edges arranged at the edge positions of the bottom plate 4, each retaining edge and the bottom plate 4 enclose a containing groove 4.1, the graphene functionalized inorganic fiber cloth 100 is laid in the containing groove 4.1, the ceramic block 1 is placed in the containing groove 4.1 and is pressed on the graphene functionalized inorganic fiber cloth 100, and the graphene functionalized inorganic fiber cloth 100 has electrode sheets 5 for connecting external power supply.

[0053] As shown in Figures 1-3 , the bottom plate 4 is square, retaining edges are arranged on both sides in the width direction and on the back side in the length direction of the bottom plate 4, which are strip-shaped structures protruding upward in the thickness direction, so that the space above the bottom plate 4 is enclosed by each retaining edge to form a containing groove 4.1, and the containing groove 4.1 leaves an opening 11 on the front side in the length direction of the bottom plate 4.

[0054] Further, the plurality of retaining edges include a left retaining edge 8, a right retaining edge 9 and a back retaining edge 10, the left retaining edge 8 and the right retaining edge 9 are located on the left and right sides of the bottom plate 4, and the back retaining edge 10 is located on the back side of the bottom plate 4 and connected to the left retaining edge 8 and the right retaining edge 9 at both ends, each containing groove 4.1 enclosed by the retaining edge and the bottom plate 4 leaves an opening 11 on the front side of the bottom plate 4, the ceramic block 1 is embedded in the containing groove 4.1 through the position of the opening 11, and the pressing strip 3 is arranged at the position of the opening 11. In this embodiment, the graphene functionalized inorganic fiber cloth 100 can be gently laid into the containing groove 4.1 from top to bottom, and the graphene functionalized inorganic fiber cloth 100 is attached to the bottom position of the containing groove 4.1, then the ceramic block 1 is pressed on the graphene functionalized inorganic fiber cloth 100, finally the ceramic block 1 is fixed with the bottom frame through the pressing strip 3, the external power supply provides electric energy for the graphene functionalized inorganic fiber cloth 100 through the electrode sheets 5, and the heat generated by the graphene functionalized inorganic fiber cloth 100 after being electrified is constrained in the containing groove 4.1 by the bottom frame made of insulating and heat-insulating material, and finally the ceramic block 1 is heated by heat conduction.

[0055] Preferably, the left retaining edge 8, the right retaining edge 9 and the back retaining edge 10 are in an integral structure with the bottom plate 4.

[0056] Preferably, the ceramic block 1 is made of insulating and heat-conducting ceramic material.

[0057] Embodiment Five

[0058] Based on the above preferred embodiment four, as shown in Figure 1 and Figure 2As shown, the electrode sheet 5 of the graphene functionalized inorganic fiber cloth 100 is exposed outside the bottom frame along the horizontal direction at the position of the opening 11, that is, the electrode sheet 5 is located on the side of the graphene functionalized inorganic fiber cloth 100 facing the position of the opening 11, one end of the electrode sheet 5 is electrically connected with the graphene functionalized inorganic fiber cloth 100, and the other end of the electrode sheet 5 extends outward in the horizontal direction to outside the opening 11. When the pressing strip 3 is installed in the opening 11 and fixedly connected with the bottom plate 4, the pressing strip 3 presses the electrode sheet 5 and makes the end of the electrode sheet 5 exposed as shown. Figure 1 As shown, the electrode sheet 5 of the graphene functionalized inorganic fiber cloth 100 is exposed outside the bottom frame along the horizontal direction at the position of the opening 11, that is, the electrode sheet 5 is located on the side of the graphene functionalized inorganic fiber cloth 100 facing the position of the opening 11, one end of the electrode sheet 5 is electrically connected with the graphene functionalized inorganic fiber cloth 100, and the other end of the electrode sheet 5 extends outward in the horizontal direction to outside the opening 11. When the pressing strip 3 is installed in the opening 11 and fixedly connected with the bottom plate 4, the pressing strip 3 presses the electrode sheet 5 and makes the end of the electrode sheet 5 exposed as shown.

[0059] Example Six

[0060] Based on the above preferred embodiment four, the pressing strip 3 is threadedly connected with the bottom frame by the conductive screw 12, the conductive screw 12 is electrically connected with the electrode sheet 5 of the graphene functionalized inorganic fiber cloth 100, and one end of the conductive screw 12 is exposed outside the pressing strip 3. Preferably, the conductive screw 12 includes but is not limited to molybdenum screw, tungsten screw, and stainless steel screw. The lower end of the conductive screw 12 is threadedly fastened with a nut, and the upper end of the conductive screw 12 has a part exposed above the pressing strip 3, which serves as an electrode for electrical connection with an external power source.

[0061] Example Seven

[0062] Based on the above preferred example of the pressing strip 3 fixing the ceramic block 1 in the above embodiments: the accommodating groove 4.1 is provided with a sliding groove 13 on the inner wall of each of the two sides corresponding to the width direction of the bottom plate, the two sliding grooves 13 are symmetrically arranged, the width of the opening 11 matches the width of the accommodating groove 4.1, and the ceramic block 1 is provided with a sliding block 14 matching the sliding groove 13 on each of the two sides in the width direction. Thus, after the graphene functionalized inorganic fiber cloth 100 is laid in the accommodating groove 4.1 and attached to the groove bottom position of the accommodating groove 4.1, the ceramic block 1 can be slid into the accommodating groove 4.1 from the opening 11 in the horizontal direction. Since the sliding block 14 and the sliding groove 13 can only slide in the length direction of the bottom plate 4, both the thickness direction and the width direction are limited. After the ceramic block 1 is moved inward to the limit position, the pressing strip 3 is fixed at the opening position and the bottom frame, the sliding block 14 is limited in the sliding groove 13, and finally the ceramic block 1 is fixedly connected with the bottom frame, completing the installation of the ceramic block 1.

[0063] Example Eight

[0064] In the above embodiment, in order to ensure the heat conduction performance between the graphene functionalized inorganic fiber cloth 100 and the ceramic block, the graphene functionalized inorganic fiber cloth 100 and the ceramic block 1 need to be kept in a state of adhesion, and the graphene functionalized inorganic fiber cloth 100 is in a sheet structure with a relatively small thickness. During the sliding process of the ceramic block 1 in the horizontal direction, there will be a large sliding friction force between the lower end of the ceramic block 1 and the upper end surface of the graphene functionalized inorganic fiber cloth 100. This sliding friction force can cause damage to the graphene functionalized inorganic fiber cloth 100. Therefore, the improvement of the present embodiment is that the ceramic block 1 comprises a backing plate 6 and a top block 7, the backing plate 6 is located between the top block 7 and the graphene functionalized inorganic fiber cloth 100, the inner wall of the accommodating groove 4.1 is provided with a sliding groove 13, and the outer side wall of the top block 7 is provided with a sliding block 14 which is in sliding cooperation with the sliding groove 13. When the pressing strip 3 is fixedly connected with the bottom frame, the sliding block 14 is limited in the sliding groove 13, so that the ceramic block 1 is fixedly connected with the bottom frame. The horizontal direction size of the backing plate 6 matches that of the graphene functionalized inorganic fiber cloth 100, so that the backing plate 6 is lightly pressed on the graphene functionalized inorganic fiber cloth 100 from top to bottom, and then the top block 7 is slidably clamped into the accommodating groove 4.1. In this process, the sliding friction force between the backing plate 6 and the top block 7 will not cause damage to the graphene functionalized inorganic fiber cloth 100.

[0065] As shown in Figures 2-7 , the left and right side edges 8 and 9 are provided with symmetrically arranged sliding grooves 13, the rear side edge 10 is provided with a clamping groove 15, the left and right sides of the top block 7 are respectively provided with sliding blocks 14, and the rear side of the top block 7 is provided with a convex edge 16 which matches the clamping groove 15. When the top block 7 in the ceramic block moves to the limit position to the right as shown in Figure 5 , the convex edge 16 on the top block 7 can be clamped into the clamping groove 15, so that the left side, the right side and the rear side of the top block 7 are all fixedly limited, and the top block 7 is more firmly fixed in the bottom frame.

[0066] Preferably, as shown in Figure 4 , the front side of the top block 7 is provided with a second convex edge 17 which protrudes outward in the horizontal direction, and the pressing strip 3 is provided with a second clamping groove 3.1 at a position corresponding to the second convex edge 17. When the pressing strip 3 is fixed with the bottom frame, the pressing strip 3 can apply a downward pressure on the second convex edge 17 through the second clamping groove 3.1. Thus, not only the four sides of the ceramic block 1 are fixedly connected, but also the downward force applied by the pressing strip 3 on the second convex edge 17 can make the ceramic block 1 adhere more closely to the graphene functionalized inorganic fiber cloth 100.

[0067] Further, as shown in Figure 4As shown, the upper end surface of the second protrusion 17 and the top surface in the second clamping groove 3.1 of the pressing strip 3 are abutted by the guide inclined surface 18. Thus, when the pressing strip 3 presses the second protrusion 17, a horizontal inward force is formed on the top block 7, which in turn forms a downward force between the protrusion 16 and the clamping groove 15, so that the front side and the rear side of the top block 7 can obtain downward forces during the mutual fixing and installation of the pressing strip 3 and the bottom frame, and the top block 7, the backing plate 6 and the graphene functional inorganic fiber cloth 100 are better pressed and attached.

[0068] In the above embodiment, although the ceramic block 1 adopts a split structure, the backing plate 6 is first pressed against the graphene functional inorganic fiber cloth 100, and then the top block 7 is slid into the limit position from the opening position along the horizontal direction to complete the installation and fixation of the ceramic block 1, but there is an air gap between the backing plate 6 and the top block 7, which will lose part of the heat conduction performance compared with a whole ceramic block 1. Therefore, the improvement of the present embodiment is that a gluey heat-conducting filler is coated between the backing plate 6 and the top block 7. The air gap between the backing plate 6 and the top block 7 is reduced by the heat-conducting filler, so as to improve the heat conduction performance between the two. Preferably, a heat-conducting filler is coated between the backing plate 6 and the top block 7, and the heat-conducting filler is preferably heat-conducting silicone grease, heat-conducting resin or heat-conducting glue.

[0069] It should be noted that in the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0070] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0071] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through the intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0072] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or simply indicate that the first feature is higher than the second feature in horizontal height.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or simply indicate that the first feature is lower than the second feature in horizontal height.

[0073] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application.In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

[0075] For the skilled in the art, after reading the above description, various changes and modifications will undoubtedly be obvious.The appended claims should be considered as covering all changes and modifications within the true intention and scope of the present application.Any and all equivalent scope and content within the scope of claims should be considered as still belonging to the intention and scope of the present application.

Claims

1. A graphene film electric heating device, characterized in that: The graphene functionalized inorganic fiber cloth (100) and the heat-conducting carrier (200) are closely adhered in a mechanical fixed manner; The graphene functionalized inorganic fiber cloth (100) is any one of graphene functionalized glass fiber cloth, graphene functionalized quartz fiber cloth, graphene functionalized ceramic fiber cloth, graphene functionalized mica fiber cloth and graphene functionalized basalt fiber cloth. The graphene functionalized inorganic fiber cloth (100) comprises a fiber cloth (101) and one or more layers of continuous graphene film (102) covering the fiber cloth (101), and the thickness of the continuous graphene film (102) is 1-20 nm.

2. The graphene film electric heating device according to claim 1, characterized in that: The heat-conducting carrier (200) comprises a ceramic block (1), and the graphene functionalized inorganic fiber cloth (100) and the ceramic block (1) are bonded by a heat-conducting type insulating paste (2). The heat-conducting type insulating paste (2) is magnesium oxide paste or heat-conducting silica gel.

3. A graphene film electric heating device according to claim 1 or 2, characterized in that: The heat-conducting carrier (200) comprises a bottom frame, a ceramic block (1) and a pressing strip (3), the pressing strip (3) is detachably connected with the bottom frame, so that the ceramic block (1) is fixed with the bottom frame, and the graphene functionalized inorganic fiber cloth (100) is clamped between the bottom frame and the ceramic block (1). The pressing strip (3) and the bottom frame are made of one or more of mica, magnesium oxide ceramic, high-temperature resistant polytetrafluoroethylene and high-temperature resistant PPL.

4. A graphene film electrical heating device according to claim 3, characterised in that: The bottom frame is made of insulating and heat-insulating material, and comprises a bottom plate (4) and a plurality of retaining edges arranged at the edge positions of the bottom plate (4), each retaining edge and the bottom plate (4) jointly form a containing groove (4.1), the graphene functionalized inorganic fiber cloth (100) is laid in the containing groove (4.1), the ceramic block (1) is placed in the containing groove (4.1) and is pressed on the graphene functionalized inorganic fiber cloth (100), and the graphene functionalized inorganic fiber cloth (100) has an electrode sheet (5) for connecting an external power supply.

5. A graphene film electrical heating device according to claim 4, characterised in that: The plurality of retaining edges comprise a left retaining edge (8), a right retaining edge (9) and a rear retaining edge (10), the left retaining edge (8) and the right retaining edge (9) are located at the left and right sides of the bottom plate (4), the rear retaining edge (10) is located at the rear side of the bottom plate (4) and is connected at both ends with the left retaining edge (8) and the right retaining edge (9), each retaining edge and the bottom plate (4) jointly form a containing groove (4.1) with an opening (11) left at the front side of the bottom plate (4), the ceramic block (1) is embedded in the containing groove (4.1) through the position where the opening (11) is located, and the pressing strip (3) is arranged at the position where the opening (11) is located.

6. The graphene film electric heating device according to claim 5, characterized in that: The electrode sheet (5) of the graphene functionalized inorganic fiber cloth (100) is exposed outside the bottom frame along the horizontal direction through the position where the opening (11) is located.

7. The graphene film electric heating device according to claim 5, characterized in that: The pressing strip (3) is threadedly connected with the bottom frame by a conductive screw (12), the conductive screw (12) is electrically connected with the electrode sheet (5) of the graphene functionalized inorganic fiber cloth (100), and one end of the conductive screw (12) is exposed outside the pressing strip (3).

8. A graphene film electrical heating device according to any one of claims 5 to 7, wherein: The inner wall of the accommodating groove (4.1) is provided with a sliding groove (13), and the outer side wall of the ceramic block (1) is provided with a sliding block (14) in sliding fit with the sliding groove (13); when the pressing strip (3) is fixedly connected with the bottom frame, the sliding block (14) is limited in the sliding groove (13), so that the ceramic block (1) is fixedly connected with the bottom frame.

9. A graphene film electrical heating device according to any one of claims 5 to 7, wherein: The ceramic block (1) comprises a backing plate (6) and a top block (7), the backing plate (6) is located between the top block (7) and the graphene functionalized inorganic fiber cloth (100), the inner wall of the accommodating groove (4.1) is provided with a sliding groove (13), and the outer side wall of the top block (7) is provided with a sliding block (14) in sliding fit with the sliding groove (13); when the pressing strip (3) is fixedly connected with the bottom frame, the sliding block (14) is limited in the sliding groove (13), so that the ceramic block (1) is fixedly connected with the bottom frame.

10. The graphene film electric heating device according to claim 9, characterized in that: The left side of the top block (7) is provided with a sliding block (14), and the right side of the top block (7) is provided with a sliding block (14).

11. The graphene film electric heating device according to claim 9, characterized in that: The backing plate (6) and the top block (7) are coated with heat-conducting silicone grease, heat-conducting resin or heat-conducting glue.

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